Spdif - RME Audio ADI-2 Pro User Manual

Thanks to a highly sensitive input stage
SPDIF coaxial can be fed too by using a
simple cable adapter phono/XLR. To
achieve this, pins 2 and 3 of a male
XLR plug are connected individually to
the two pins of a phono plug. The cable
shielding is only connected to pin 1 of
the XLR - not to the phono plug.
Output
As can be seen in the block diagrams of chapter 17, in most modes all digital outputs carry the
same signal. The ADI-2 Pro then operates like a splitter/distributor. The input signal is con-
verted to several digital formats at the same time, and can be used up to three times (AES,
SPDIF coaxial, SPDIF optical or ADAT).
In USB multi-channel mode the AES output becomes playback channels 5/6, see chapter 17.4.
The output signal coding of the ADI-2 Pro has been implemented according to AES3-1992
Amendment 4:
• 32 / 44.1 / 48 kHz, 88.2 / 96 kHz, 176.4 / 192 kHz depending on the current sample rate
• Audio use
• No Copyright, Copy permitted
• Format Professional
• Category General, Generation not indicated
• 2-Channel, No Emphasis
• Aux Bits Audio use, 24 Bit
Origin: RME
Older AES/EBU (and SPDIF) devices and record media can contain Emphasis information.
Audio signals with Emphasis have a high frequency boost, requiring high frequency attenuation
during playback. When using the ADI-2 Pro as audio interface to record SPDIF into an audio
file, the emphasis state is lost. See chapter 34.4 for details.

22.2 SPDIF

Input
Two SPDIF inputs are available, optical via TOSLINK and coaxial via the included breakout
cable, but only one can be used at a time. The input is the white RCA connector.
The currently used SPDIF input can be chosen under Setup – Options – Hardware/Diagnosis –
SPDIF In. Set to Auto the input with a valid input signal will be chosen automatically.
The optical input also understands ADAT format, up to 192 kHz, but only channels 1/2 are avail-
able.
To receive signals in AES/EBU format on the coaxial input, an adapter cable is required. Pins 2
and 3 of a female XLR plug are connected individually to the two pins of a phono plug. The
cable shielding is only connected to pin 1 of the XLR - not to the phono plug (see chapter 22.1).
User's Guide ADI-2 Pro © RME
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